Method processPreprocessor

astyle/src/ASBeautifier.cpp:1789–1876

* Process preprocessor statements and update the beautifier stacks. */

 * Process preprocessor statements and update the beautifier stacks.
 */
void ASBeautifier::processPreprocessor(const string &preproc, const string &line)
{
	// When finding a multi-lined #define statement, the original beautifier
	// 1. sets its isInDefineDefinition flag
	// 2. clones a new beautifier that will be used for the actual indentation
	//    of the #define. This clone is put into the activeBeautifierStack in order
	//    to be called for the actual indentation.
	// The original beautifier will have isInDefineDefinition = true, isInDefine = false
	// The cloned beautifier will have   isInDefineDefinition = true, isInDefine = true
	if (shouldIndentPreprocDefine && preproc == "define" && line[line.length() - 1] == '\\')
	{
		if (!isInDefineDefinition)
		{
			ASBeautifier* defineBeautifier;

			// this is the original beautifier
			isInDefineDefinition = true;

			// push a new beautifier into the active stack
			// this beautifier will be used for the indentation of this define
			defineBeautifier = new ASBeautifier(*this);
			activeBeautifierStack->push_back(defineBeautifier);
		}
		else
		{
			// the is the cloned beautifier that is in charge of indenting the #define.
			isInDefine = true;
		}
	}
	else if (preproc.length() >= 2 && preproc.substr(0, 2) == "if")
	{
		if (isPreprocessorConditionalCplusplus(line) && !g_preprocessorCppExternCBracket)
			g_preprocessorCppExternCBracket = 1;
		// push a new beautifier into the stack
		waitingBeautifierStackLengthStack->push_back(waitingBeautifierStack->size());
		activeBeautifierStackLengthStack->push_back(activeBeautifierStack->size());
		if (activeBeautifierStackLengthStack->back() == 0)
			waitingBeautifierStack->push_back(new ASBeautifier(*this));
		else
			waitingBeautifierStack->push_back(new ASBeautifier(*activeBeautifierStack->back()));
	}
	else if (preproc == "else")
	{
		if (waitingBeautifierStack && !waitingBeautifierStack->empty())
		{
			// MOVE current waiting beautifier to active stack.
			activeBeautifierStack->push_back(waitingBeautifierStack->back());
			waitingBeautifierStack->pop_back();
		}
	}
	else if (preproc == "elif")
	{
		if (waitingBeautifierStack && !waitingBeautifierStack->empty())
		{
			// append a COPY current waiting beautifier to active stack, WITHOUT deleting the original.
			activeBeautifierStack->push_back(new ASBeautifier(*(waitingBeautifierStack->back())));
		}
	}